must preclean
Verbe régulier : preclean - precleaned- precleaned

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must preclean
you must preclean
she must preclean
we must preclean
you must preclean
they must preclean 	I must be precleaning
you must be precleaning
she must be precleaning
we must be precleaning
you must be precleaning
they must be precleaning	I must have precleaned
you must have precleaned
she must have precleaned
we must have precleaned
you must have precleaned
they must have precleaned	I must have been precleaning
you must have been precleaning
she must have been precleaning
we must have been precleaning
you must have been precleaning
they must have been precleaning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't preclean
you mustn't preclean
she mustn't preclean
we mustn't preclean
you mustn't preclean
they mustn't preclean 	I mustn't be precleaning
you mustn't be precleaning
she mustn't be precleaning
we mustn't be precleaning
you mustn't be precleaning
they mustn't be precleaning	I mustn't have precleaned
you mustn't have precleaned
she mustn't have precleaned
we mustn't have precleaned
you mustn't have precleaned
they mustn't have precleaned	I mustn't have been precleaning
you mustn't have been precleaning
she mustn't have been precleaning
we mustn't have been precleaning
you mustn't have been precleaning
they mustn't have been precleaning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I preclean?
must you preclean?
must she preclean?
must we preclean?
must you preclean?
must they preclean? 	must I be precleaning?
must you be precleaning?
must she be precleaning?
must we be precleaning?
must you be precleaning?
must they be precleaning? 	must I have precleaned?
must you have precleaned?
must she have precleaned?
must we have precleaned?
must you have precleaned?
must they have precleaned? 	must I have been precleaning?
must you have been precleaning?
must she have been precleaning?
must we have been precleaning?
must you have been precleaning?
must they have been precleaning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I preclean?
mustn't you preclean?
mustn't she preclean?
mustn't we preclean?
mustn't you preclean?
mustn't they preclean? 	mustn't I be precleaning?
mustn't you be precleaning?
mustn't she be precleaning?
mustn't we be precleaning?
mustn't you be precleaning?
mustn't they be precleaning? 	mustn't I have precleaned?
mustn't you have precleaned?
mustn't she have precleaned?
mustn't we have precleaned?
mustn't you have precleaned?
mustn't they have precleaned? 	mustn't I have been precleaning?
mustn't you have been precleaning?
mustn't she have been precleaning?
mustn't we have been precleaning?
mustn't you have been precleaning?
mustn't they have been precleaning?